<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding:0;
            margin: 0;
        }
        .content {
            padding: 30px;
            width: 400px;
            height: 500px;
            display: grid;
            grid-template-columns: repeat(4,1fr);
            grid-template-rows: repeat(5,1fr);
            gap: 10px;
        }
        .key {
            border-radius: 6px;
            box-shadow: 3px 3px 9px #828282, -3px -3px 9px #fff;
            font-size: 20px;
            display: flex;
            text-align: center;
            justify-content: center;
            align-items: center;
        }
        .content .key:nth-child(8) {
            grid-row: 2/4;
            grid-column: 4/5;
        }
        .content .key:nth-child(15) {
            grid-row: 4/6;
            grid-column: 4/5;
        }
        .content .key:nth-child(16) {
            grid-row: 5/6;
            grid-column: 1/3;
        }
    </style>
</head>
<body>
    <div class="content">
        <div class="key">Num Lock</div>
        <div class="key">/</div>
        <div class="key">*</div>
        <div class="key">-</div>
        <div class="key">7</div>
        <div class="key">8</div>
        <div class="key">9</div>
        <div class="key">+</div>
        <div class="key">4</div>
        <div class="key">5</div>
        <div class="key">6</div>
        <div class="key">1</div>
        <div class="key">2</div>
        <div class="key">3</div>
        <div class="key">Enter</div>
        <div class="key">0</div>
        <div class="key">.</div>
    </div>
</body>
</html>